static uint16_t *ao_usb_ep0_tx_buffer;
static uint16_t *ao_usb_ep0_rx_buffer;
+/* Pointer to interrupt buffer in USB memory */
+static uint16_t ao_usb_int_tx_offset;
+
/* Pointer to bulk data tx/rx buffers in USB memory */
static uint16_t ao_usb_in_tx_offset;
static uint16_t *ao_usb_in_tx_buffer;
+static uint16_t ao_usb_out_rx_offset;
static uint16_t *ao_usb_out_rx_buffer;
/* System ram shadow of USB buffer; writing individual bytes is
return (uint16_t *) (stm_usb_sram + sram_addr);
}
-#if AO_USB_DIRECTIO
static inline uint16_t ao_usb_packet_buffer_offset(uint16_t *addr)
{
return (uint16_t) ((uint8_t *) addr - stm_usb_sram);
}
-#endif
static inline uint32_t ao_usb_epr_stat_rx(uint32_t epr) {
return (epr >> STM_USB_EPR_STAT_RX) & STM_USB_EPR_STAT_RX_MASK;
}
static void
-ao_usb_init_btable(void)
+ao_usb_alloc_buffers(void)
{
ao_usb_sram_addr = 0;
ao_usb_bdt = (void *) stm_usb_sram;
-
ao_usb_sram_addr += 8 * STM_USB_BDT_SIZE;
- /* Set up EP 0 - a Control end point with 32 bytes of in and out buffers */
-
- ao_usb_bdt[0].single.addr_tx = ao_usb_sram_addr;
- ao_usb_bdt[0].single.count_tx = 0;
ao_usb_ep0_tx_buffer = ao_usb_packet_buffer_addr(ao_usb_sram_addr);
ao_usb_sram_addr += AO_USB_CONTROL_SIZE;
- ao_usb_bdt[0].single.addr_rx = ao_usb_sram_addr;
- ao_usb_bdt[0].single.count_rx = ((1 << STM_USB_BDT_COUNT_RX_BL_SIZE) |
- (((AO_USB_CONTROL_SIZE / 32) - 1) << STM_USB_BDT_COUNT_RX_NUM_BLOCK));
ao_usb_ep0_rx_buffer = ao_usb_packet_buffer_addr(ao_usb_sram_addr);
ao_usb_sram_addr += AO_USB_CONTROL_SIZE;
+ ao_usb_int_tx_offset = ao_usb_sram_addr;
+ ao_usb_sram_addr += AO_USB_INT_SIZE;
+
+ ao_usb_out_rx_buffer = ao_usb_packet_buffer_addr(ao_usb_sram_addr);
+ ao_usb_out_rx_offset = ao_usb_sram_addr;
+ ao_usb_sram_addr += AO_USB_OUT_SIZE;
+
+ ao_usb_in_tx_buffer = ao_usb_packet_buffer_addr(ao_usb_sram_addr);
+ ao_usb_in_tx_offset = ao_usb_sram_addr;
+ ao_usb_sram_addr += AO_USB_IN_SIZE;
+}
+
+static void
+ao_usb_init_btable(void)
+{
+ /* Set up EP 0 - a Control end point with 32 bytes of in and out buffers */
+
+ ao_usb_bdt[0].single.addr_tx = ao_usb_packet_buffer_offset(ao_usb_ep0_tx_buffer);
+ ao_usb_bdt[0].single.count_tx = 0;
+
+ ao_usb_bdt[0].single.addr_rx = ao_usb_packet_buffer_offset(ao_usb_ep0_rx_buffer);
+ ao_usb_bdt[0].single.count_rx = ((1 << STM_USB_BDT_COUNT_RX_BL_SIZE) |
+ (((AO_USB_CONTROL_SIZE / 32) - 1) << STM_USB_BDT_COUNT_RX_NUM_BLOCK));
}
static void
}
ao_usb_set_address(0);
+
+ ao_usb_running = 0;
}
static void
debug ("ao_usb_set_configuration\n");
/* Set up the INT end point */
- ao_usb_bdt[AO_USB_INT_EPR].single.addr_tx = ao_usb_sram_addr;
+ ao_usb_bdt[AO_USB_INT_EPR].single.addr_tx = ao_usb_int_tx_offset;
ao_usb_bdt[AO_USB_INT_EPR].single.count_tx = 0;
- ao_usb_sram_addr += AO_USB_INT_SIZE;
ao_usb_init_ep(AO_USB_INT_EPR,
AO_USB_INT_EP,
STM_USB_EPR_STAT_TX_NAK);
/* Set up the OUT end point */
- ao_usb_bdt[AO_USB_OUT_EPR].single.addr_rx = ao_usb_sram_addr;
+ ao_usb_bdt[AO_USB_OUT_EPR].single.addr_rx = ao_usb_out_rx_offset;
ao_usb_bdt[AO_USB_OUT_EPR].single.count_rx = ((1 << STM_USB_BDT_COUNT_RX_BL_SIZE) |
(((AO_USB_OUT_SIZE / 32) - 1) << STM_USB_BDT_COUNT_RX_NUM_BLOCK));
- ao_usb_out_rx_buffer = ao_usb_packet_buffer_addr(ao_usb_sram_addr);
- ao_usb_sram_addr += AO_USB_OUT_SIZE;
ao_usb_init_ep(AO_USB_OUT_EPR,
AO_USB_OUT_EP,
STM_USB_EPR_STAT_TX_DISABLED);
/* Set up the IN end point */
- ao_usb_bdt[AO_USB_IN_EPR].single.addr_tx = ao_usb_sram_addr;
+ ao_usb_bdt[AO_USB_IN_EPR].single.addr_tx = ao_usb_in_tx_offset;
ao_usb_bdt[AO_USB_IN_EPR].single.count_tx = 0;
- ao_usb_in_tx_offset = ao_usb_sram_addr;
- ao_usb_in_tx_buffer = ao_usb_packet_buffer_addr(ao_usb_in_tx_offset);
- ao_usb_sram_addr += AO_USB_IN_SIZE;
ao_usb_init_ep(AO_USB_IN_EPR,
AO_USB_IN_EP,
STM_USB_EPR_STAT_TX_NAK);
ao_usb_running = 1;
+#if AO_USB_DIRECTIO
+ ao_wakeup(&ao_usb_running);
+#endif
}
static uint16_t control_count;
{
uint16_t *buffer;
- if (!ao_usb_running)
- return NULL;
buffer = ao_usb_packet_buffer_addr(ao_usb_sram_addr);
ao_usb_sram_addr += AO_USB_IN_SIZE;
return buffer;
{
ao_arch_block_interrupts();
- /* Flush any pending regular */
- if (ao_usb_tx_count)
- _ao_usb_in_send();
+ /* Wait for everything to be ready at the same time */
+ for (;;) {
+ /* Make sure USB is connected */
+ if (!ao_usb_running) {
+ ao_sleep(&ao_usb_running);
+ continue;
+ }
+
+ /* Flush any pending regular I/O */
+ if (ao_usb_tx_count) {
+ _ao_usb_in_send();
+ continue;
+ }
+
+ /* Wait for an idle IN buffer */
+ if (ao_usb_in_pending) {
+ ao_sleep(&ao_usb_in_pending);
+ continue;
+ }
+ break;
+ }
- while (ao_usb_in_pending)
- ao_sleep(&ao_usb_in_pending);
ao_usb_in_pending = 1;
ao_usb_in_flushed = (len != AO_USB_IN_SIZE);
ao_usb_bdt[AO_USB_IN_EPR].single.addr_tx = ao_usb_packet_buffer_offset(buffer);
debug ("ao_usb_init\n");
ao_usb_ep0_state = AO_USB_EP0_IDLE;
+
+ ao_usb_alloc_buffers();
+
#if USB_ECHO
ao_add_task(&ao_usb_echo_task, ao_usb_echo, "usb echo");
#endif